One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9)(4,10)(5,13)(6,7)(8,14)(11,12)(15,16)(17,18)(19,23)(20,24)(21,30)(22,26)(25,31)(27,28)(29,32)(33,34,38,39)(35,40,43,37)(36,44,47,41)(42,46,45,48)(2,7)(4,9)(5,14)(11,16)(17,19)(18,23)(20,21)(22,27)(24,30)(25,32)(26,28)(29,31)(34,39)(37,40)(41,44)(46,48) involution — undirected(2,7)(3,10)(8,13)(11,16)(19,27)(20,29)(23,28)(24,32)(33,35,38,43)(34,40,39,37)(36,42,47,45)(41,48,44,46)(1,3,6,10)(2,4,7,9)(5,11,14,16)(8,12,13,15)(17,20,22,29)(18,24,26,32)(19,21,27,31)(23,30,28,25)(33,35)(34,37)(36,45)(38,43)(39,40)(41,48)(42,47)(44,46)(1,4)(2,3)(5,12)(6,9)(7,10)(8,11)(13,16)(14,15)(17,21)(18,25)(19,20)(22,31)(23,32)(24,28)(26,30)(27,29)(33,36,38,47)(34,41,39,44)(35,42,43,45)(37,46,40,48)(1,5,6,14)(2,8,7,13)(3,11,10,16)(4,12,9,15)(17,18)(19,28)(20,24)(21,25)(22,26)(23,27)(29,32)(30,31)(33,37)(34,35)(36,46)(38,40)(39,43)(41,42)(44,45)(47,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.